Customer purchased an AD-FMCDAQ2-EBZ that failed after using it for several hundred hours. The clock chip stopped working. An RMA was issued and the board replaced. A 2nd board has now failed, also with the clock chip not working, but with ~ 30 hours of use. The board is connected to a Xilinx 706 development board. Are there any known issues with this board? Do you have any suggestions for diagnosing why two have failed in the same manner?